With simple and intuitive wrist gestures, this Asus smartwatch lets you manage it with great smoothness and ease. The watch comes with a total of 50 professionally designed watch faces, letting you personalize your watch in a way that suits your style. You can now make and answer calls from your watch by connecting it to your smartphone via Bluetooth. Additional Details: Depending on usage, the battery lasts for up to 2 days. The ZenWatch Manager app is required to use this device's smart functions.